An illustration of Indian Key located in the Florida Keys. Indian Key State Historic Site is an island within the Florida State Park system located just a few hundred yards southeast of U.S. 1 within the Florida Keys. The island was briefly inhabited in the middle of the 19th century, but is now uninhabited. It is frequently visited by tourists, and is the subject of an archaeological project to uncover the historic building foundations. Some of the survivors of the 19 ships of the 1733 Spanish treasure fleet wrecked in the Florida Keys by a hurricane camped on Indian Key until they were rescued.